USN-3769-1: Bind vulnerability

20 September 2018

bind9 vulnerability

A security issue affects these releases of Ubuntu and its derivatives:

  • Ubuntu 18.04 LTS
  • Ubuntu 16.04 LTS
  • Ubuntu 14.04 LTS

Summary

Bind could be made to crash if it received specially crafted network traffic.

Software Description

  • bind9 - Internet Domain Name Server

Details

It was discovered that Bind incorrectly handled the deny-answer-aliases feature. If this feature is enabled, a remote attacker could use this issue to cause Bind to crash, resulting in a denial of service.

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 18.04 LTS
bind9 - 1:9.11.3+dfsg-1ubuntu1.2
Ubuntu 16.04 LTS
bind9 - 1:9.10.3.dfsg.P4-8ubuntu1.11
Ubuntu 14.04 LTS
bind9 - 1:9.9.5.dfsg-3ubuntu0.18

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

In general, a standard system update will make all the necessary changes.

References